present perfect or past simple. we ( travelled / have travelled ) about the crimea last year. mr. wrinkle knows lot because he ( travelled / has travelled ) so she has seen / saw ) this film last friday. (have seen / saw ) pete in the library today. much. 1 ( have met/met) the doctor the other day. alec ( has met / met) the the children ( decided / have decided ) what to do with the book. yesterday they (decided / have decided ) to help the villagers. mechanic two days ago.
1) Global warming ___is believed__ (to believe) to be caused by the greenhouse effect. 2) The seas_are filled) with poison: industrial and nuclear waste, chemical fertilisers and pesticides. 3) If nothing (is done) about it, one day no animal or plant will be able to live in the seas. 4) Tons of harmful substances(are emitted daily) by industrial enterprises. 5) As globalization continues and the earth’s natural processes transform local problems into international issues, few societiesare left) untouched by major environmental problems. 6) Acid rain, one of the most important environmental problems of all, cannot be seen). The invisible gases that cause acid rain usually come from automobiles or coal-burning power plants. 7) Air pollution can have serious consequences for the health of human beings; the natural ecosystems are affected) severely by it.
To come. .true
To take. place .
To go. abroad
To work. .hard
b) . 1. Excuse me, can you tell me where the Science Museum is? —Turn right at the сafe and go straight ahead.
2. Alice worked hard last year and became the best student in the class.
3. Why did you go abroad — To study English.
4. William’s dream came true yesterday. His parents gave him a mountain bike as a present.
5. Tomorrow the famous puppet show will take place on the bank of the Thames.— Really?